3.7 Product dimensions
1.
Side view of scanner.
2.
Rear view of scanner.
3.
Underside view of scanner.
Dimension
Measurement
Description
A
116.0mm (4.57 in.) Distance from
centerline of
scanner to front
of mounting base.
B
355.0mm
(13.98in.)
Distance from rear
of mounting base
to front of mounting
base.
C
209.5mm (8.25in.)
Height of radar
scanner.
D
319.5mm
(12.58in.)
Mounting base
width (rear of unit).
E
541.0mm
(21.30in.)
Width of scanner.
F
116.5mm (4.59in.)
Distance from
centerline to rear
mounting hole.
G
233.0mm (9.17in.)
Distance between
mounting holes.
H
27.5mm (1.08in.)
Distance from
centerline to front
mounting hole.
I
141.5mm (5.57in.)
Distance between
front and rear
mounting holes.
3.8 Location requirements
The optimum height for the Quantum
™
scanner is a
location that is high enough above the waterline to
give a long range line-of-sight to the horizon, but not
so high as to be adversely affected by the vessel's
pitching and rolling.
The scanner must also be mounted where it is:
• Above head height.
• Easily accessible.
• As near as possible to the vessel's centerline.
• On a rigid and stable platform, capable of securely
supporting the scanner under seagoing conditions.
• Clear of large objects such as the flybridge,
large engine stacks, searchlights, horns, masts
etc. (see
Shadow areas and false echoes
for
additional information).
• Clear of heat and fumes.
• At least 1m (3ft) from a magnetic compass or
other scanners.
Shadow areas and false echoes
Mount the Radar scanner away from large structures
or equipment, such as engine stacks, searchlights,
horns, or masts. These objects may cause shadow
areas and false echoes. For example, if you
mount the Radar scanner on a mast, echoes from
other targets may be reflected from the mast. Wet
sails may also cause shadow areas, so Radar
performance may be reduced in the rain. It is
particularly important to avoid shadow areas near the
bow. Raising or even lowering the Radar scanner
may help to reduce these effects.
In shadow areas beyond the obstruction there will be
a reduction of the beam intensity. There may be a
blind sector if the beam intensity is not sufficient to
obtain an echo from an object. This may occur even
at close range. For this reason the angular width
and relative bearing of any shadow area must be
determined at installation.
You may be able to detect shadow areas or false
echoes on your multifunction display. For example,
sea clutter can be used as a good indicator of blind
arcs. Dark sectors on the Radar display indicate
possible shadowed areas. This information should
be posted near the display unit and operators must
be alert for targets in these blind areas.
Planning the installation
19
